magnetic needle

No magnetic needle was ever truer than his finger when he touched the vulnerable spot in an opponent's mind.

The only instrument we used was the special magnetic needle.

Was it, then, Negoro's interest for the magnetic needle to return to its true direction?

"This way, they cannot fall back even on the variations of the magnetic needle."

There are no good tables of the declinations of the magnetic needle.

He used a magnetic needle which dipped into a mercury contact when an electric current passed through the surrounding coil.

When a British ship passed by over it, the mass of the ship caused the magnetic needle inside the mine to move slightly.

The magnetic needle is free to rotate in the horizontal plane.

Ørsted is seen demonstrating the effect of an electric current on a magnetic needle.

A magnetic needle is placed parallel with the copper strip.